[TowerTalk] Replacing coax

[Keith Dutson]

I like to use a single piece of RG213 from the antenna feed point (balun or
other matching device) to the tower coax.  If you prefer, LMR 400 comes in a
flexible version also, and RG8 is certainly acceptable (low loss) on 40
meters.  A barrel connector should not lose more than about .1 dB on 40
meters.

Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Tom Martin
Sent: Monday, October 11, 2004 1:41 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Replacing coax

I am replacing a 90' length of RG8 water damaged coax to my 40 meter beam.
I have LMR 400 for the main run up the tower but want to use a RG8 section
for the rotator loop.  There are two ways to do this. First, a 14' section
of RG8 from the feed point of the beam with one PL259 and one barrel
connector to join the LMR.  Secondly, a 10' section of LMR and PL259 to a
barrel connector and a 4' section of RG8 for the loop to join the LMR that
goes down 80' to the antenna relay box at the base of the tower.  This
configuration would require 4 PL259's and two barrel connectors.  I want to
avoid the many possible problem areas with the multiple connections.  I
think that I have answered my own question but wasn't sure if adding that
much RG8 to the run would offset the benefit of the LMR 400.  I suppose on
40 meters the loss would be negligible.  Am I correct?

73,

Tom W8JWN
_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk